package com.atguigu.flink.chapter11;

import com.atguigu.flink.bean.WaterSensor;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

import java.time.Duration;

import static org.apache.flink.table.api.Expressions.$;

/**
 * @Author lizhenchao@atguigu.cn
 * @Date 2021/12/21 10:04
 */
public class Flink09_Time_Event {
    public static void main(String[] args) {
        Configuration conf = new Configuration();
        conf.setInteger("rest.port", 20000);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);
        env.setParallelism(1);
        
        DataStream<WaterSensor> waterSensorStream =
            env
                .fromElements(new WaterSensor("sensor_1", 1001L, 10),
                              new WaterSensor("sensor_1", 2000L, 20),
                              new WaterSensor("sensor_2", 3000L, 30),
                              new WaterSensor("sensor_1", 4000L, 40),
                              new WaterSensor("sensor_1", 5000L, 50),
                              new WaterSensor("sensor_2", 6000L, 60))
                .assignTimestampsAndWatermarks(
                    WatermarkStrategy
                        .<WaterSensor>forBoundedOutOfOrderness(Duration.ofSeconds(3))
                        .withTimestampAssigner((ws, ts) -> ws.getTs())
                );
        
        StreamTableEnvironment tEnv = StreamTableEnvironment.create(env);
        //1. 直接新增一个字段, 用来表示事件时间
//        Table table = tEnv.fromDataStream(waterSensorStream, $("id"), $("ts"), $("vc"), $("et").rowtime());
        // 2. 把现有字段, 标记为事件时间
        Table table = tEnv.fromDataStream(waterSensorStream, $("id"), $("ts").rowtime(), $("vc"));
        table.execute().print();
        
    }
}
